\anchor quadrangle_preference_anchor
<h2>Quadrangle Preference</h2>
-This algorithm can be used only together with Quadrangle (Mapping)
-algorithm. It allows to build quadrangular meshes even if the number
+This algorithm can be used together with Quadrangle (Mapping) and Netgen 2D
+algorithms.
+
+It allows Netgen 2D to build quadrangular meshes at any conditions.
+
+It allows Quadrangle (Mapping) to build quadrangular meshes even if the number
of nodes at the opposite edges of a meshed face is not equal,
otherwise this mesh will contain some triangular elements.
<br>
This hypothesis has one restriction on its work: the total quantity of
segments on all four sides of the face must be even (divisible by 2).
+
<br>
\anchor triangle_preference_anchor
<h2>Triangle Preference</h2>
